With the popularization and application of the electronic transformer with small analog voltage signal, it is necessary to test the static meters connected via electronic transformer matched with it. This kind of meter is different from the traditional electromagnetic transformer in input signal, calibration methods and other aspects, and the calibration equipment and methods are also changed. Because there is no corresponding calibration equipment, it is necessary to use the traditional three-phase power meter standard calibration device, combined with the standard signal conversion device to carry out the accuracy test of the power meter, and to add a small analog voltage signal impedance matching test to the calibration project. The verification method introduced in this paper provides an important verification method and basis for popularizing the application of static meters connected via electronic transformer in electronic transformer measurement system.